Learn how proportional relationships look on a graph, understand proportionality using worked examples, and for Higher tier, revise algebraic proportion.

How to Make a Graph in Excel With Word and Number Variables. Microsoft Excel can perform numerous statistical functions, as well as create charts from statistical data. Statistical data includes ...

Understanding the Drake Equation This simple formulation is generally agreed to be the “second most-famous equation in science (after E= mc 2),” and you can find it in nearly every astronomy textbook.

The efficiency gain of seemingly unrelated regression (SUR) relative to OLS is a decreasing function of correlation of variables across equations. This article examines the efficiency gain for an ...

Claes Fornell, David F. Larcker, Evaluating Structural Equation Models with Unobservable Variables and Measurement Error, Journal of Marketing Research, Vol. 18, No ...